Air filters are an important part of vehicle maintenance. What many people don’t realize is you actually have two filters; one for your engine, and a cabin filter to filter the air coming into your car. Both of them function the same way but have entirely different purposes. They are often neglected, particularly the cabin filter, and yours may need to be changed right now. This guide, provided by Mercie J Auto Care in Mesa, AZ, highlights the importance of filters, symptoms of an overused one, and how to maintain them.